TLV320AIC3109EVM Software
18
SLAU738 – September 2017
Copyright © 2017, Texas Instruments Incorporated
TLV320AIC3109EVM-K
4.5
Audio Interface Tab
The
Audio Interface
tab, shown in
, allows configuration of the audio digital data interface to the
TLV320AIC3109-Q1.
Figure 11. Audio Interface Tab
The interface mode may be selected using the
Transfer Mode
control—selecting either I
2
S mode, DSP
mode, or Right- or Left-Justified modes. Word length can be selected using the
Word Length
control, and
the bit clock rate can also be selected using the
Bit Clock
rate control. The
Data Word Offset
, used in
TDM mode (see
TLV320AIC3109-Q1 Automotive, Low-Power, 96-kHz, Mono Audio Codec
) can also be
selected on this tab.
Along the bottom of this tab are controls for choosing the
BLCK
and
WCLK
as being either inputs or
outputs. With the codec configured in
Slave
mode, both the BCLK and WCLK are set to inputs. If the
codec is in
Master
mode, then BCLK and WCLK are configured as outputs. Additionally, two buttons
provide the option for placing the DOUT line in a 3-state mode when there is not valid data and
transmitting BLCK and WCLK when the codec is powered down.
Re-synchronization of the audio bus is enabled using the controls in the lower right corner of this screen.
Re-synchronization is done if the group delay changes by more than ±FS / 4 for the ADC or DAC sample
rates (see
TLV320AIC3109-Q1 Automotive, Low-Power, 96-kHz, Mono Audio Codec
). The channels can
be soft muted when doing the re-sync if the
Soft Mute
button is enabled.
The default mode for the EVM is configured as 44.1 kHz, 16-bit, I
2
S words, and the codec is a slave
(BCLK and WCLK are supplied to the codec externally). For use with the PC software and the USB-
MODEVM, the default settings should be used; no change to the software is required.
